带纵摇前墙的新型振荡水柱式波浪能装置转换效率以及水动力性能数值研究
Numerical simulation on the extraction efficiency and hydrodynamic performance of an OWC device with a pitching front-wall
查看参考文献39篇
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文摘
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提出了一种带纵摇前墙的新型振荡水柱式波浪能(OWC)装置,借助OpenFOAM开源代码平台和waves2Foam工具包,数值模拟研究带纵摇前墙OWC装置的水动力性能和转换效率。主要研究前墙吃水d_1、前墙密度ρ、后墙吃水d_2、旋转约束力(用无量纲弹簧系数K表示)对该装置的反射系数C_r、透射系数C_t、耗散系数C_d和波能转换效率ξ的影响规律。结果表明,纵摇前墙能有效减少能量耗散,提高波能转换效率ξ;无量纲弹簧系数K对装置转换效率的影响主要集中在短波区域,且在K为0时装置具有最大的转换效率和最宽的高效频率带;前墙的密度和吃水深度对水动力系数影响不大;后墙的吃水深度对水动力系数影响较大,增加吃水深度能有效提高装置对于中短波和中长波段的波能转换效率,但对系统整体的能量耗散系数影响不大。 |
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其他语种文摘
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A novel oscillating water column (OWC) device with a pitching front-wall is numerically studied based on the open source platform OpenFOAM and the associated toolbox waves2Foam. The numerical model is employed to investigate the effects of the immersion depth of front-wall d_1,the density of the front-wall ρ,the immersion depth of back-wall d_2 and the rotational restraint force (represented by the dimensionless stiffness coefficient K) on the reflection coefficients C_r,transmission coefficients C_t,dissipation coefficient C_d and wave energy conversion efficiency ξ of this device. The results show that a pitching front-wall can effectively decrease the dissipation of energy and lead to the increase of wave energy conversion efficiency. The non-dimensional spring coefficient K also affects the wave energy conversion efficiency ξ of the device,especially in the short-wave regimes. The device has the maximum wave energy conversion efficiency and the widest efficient frequency band when K is 0. The density and the immersion depth of thin front-wall have insignificant influence on the hydrodynamic coefficient,while the immersion depth of back-wall affects the hydrodynamic coefficient efficiently. Increasing the draught of back-wall can effectively improve the wave energy conversion efficiency of the device in medium wave regimes,but has little effect on the overall energy dissipation coefficient. |
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来源
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海洋工程
,2021,39(5):66-77 【扩展库】
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DOI
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10.16483/j.issn.1005-9865.2021.05.007
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关键词
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OpenFOAM
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振荡水柱
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纵摇前墙
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透射系数
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耗散系数
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波能转换效率
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地址
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1.
浙江大学海洋学院, 浙江, 舟山, 316021
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中国科学院力学研究所, 北京, 100190
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1005-9865 |
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学科
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海洋学 |
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基金
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国家自然科学基金青年科学基金
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文献收藏号
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CSCD:7084246
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